I've been looking for the name of the wheel of which a few are visible on this picture (not the object itself, but the wheels that are used on it!):
I've been looking for terms like "counter wheel", "counter reel", and so on – but can't seem to find anything that names the actual wheels themselves.
I know that these wheels have a name as I've seen it before, but I can't recall what it was. If I had to describe it, "a numbered wheel that represents a counted digit, either stand-alone or as part of a larger number".
Best Answer
If they were oriented to face you axle-on, they would be called dials, of course. As they're not, the best I can think of is digit wheel. I can't find an official definition page, but Alibaba has a category page for that term, and everything on it looks like what you're talking about...